Duplex (moth)
WordNet
adjective
(1) Allowing communication in opposite directions simultaneously
"Duplex system"
"Duplex telephony"
(2) (used technically of a device or process) having two parts
"A duplex transaction"
noun
(3) An apartment having rooms on two floors that are connected by a staircase
(4) A house with two units sharing a common wall
verb
(5) Change into a duplex